Issue #500 - Use enums for Block Device Mappings

core/src/main/java/org/openstack4j/model/compute/BDMDestType.java

@@ -0,0 +1,35 @@
+package org.openstack4j.model.compute;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Block Device Mapping Destination Type
+ * 
+ * @author Jeremy Unruh
+ * @see http://docs.openstack.org/developer/nova/block_device_mapping.html
+ */
+public enum BDMDestType {
+
+    /** Will either mean an ephemeral blank disk on hypervisor local storage, or a swap disk  **/
+    LOCAL, 
+    /** Creates a blank Cinder volume and attaches it. This will also require the volume size to be set **/
+    VOLUME;
+
+    @JsonCreator
+    public static BDMDestType value(String v) {
+        if (v == null)
+            return LOCAL;
+        try {
+            return valueOf(v.toUpperCase());
+        } catch (IllegalArgumentException e) {
+            return LOCAL;
+        }
+    }
+
+    @JsonValue
+    public String value() {
+        return name().toLowerCase();
+    }
+
+}

core/src/main/java/org/openstack4j/model/compute/BDMSourceType.java

@@ -0,0 +1,35 @@
+package org.openstack4j.model.compute;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Block Device Mapping Source Type
+ * 
+ * @author Jeremy Unruh
+ * @see http://docs.openstack.org/developer/nova/block_device_mapping.html
+ */
+public enum BDMSourceType {
+    BLANK,
+    IMAGE,
+    SNAPSHOT,
+    VOLUME
+    ;
+
+    @JsonCreator
+    public static BDMSourceType value(String v) {
+        if (v == null)
+            return VOLUME;
+        try {
+            return valueOf(v.toUpperCase());
+        } catch (IllegalArgumentException e) {
+            return VOLUME;
+        }
+    }
+
+    @JsonValue
+    public String value() {
+        return name().toLowerCase();
+    }
+
+}

core/src/main/java/org/openstack4j/model/compute/builder/BlockDeviceMappingBuilder.java

@@ -1,6 +1,8 @@
 package org.openstack4j.model.compute.builder;
 
 import org.openstack4j.common.Buildable;
+import org.openstack4j.model.compute.BDMDestType;
+import org.openstack4j.model.compute.BDMSourceType;
 import org.openstack4j.model.compute.BlockDeviceMappingCreate;
 
 /**
@@ -40,15 +42,15 @@ public interface BlockDeviceMappingBuilder extends Buildable.Builder<BlockDevice
 	 * @param type the destination type
 	 * @return BlockDeviceMappingBuilder
 	 */
-	BlockDeviceMappingBuilder destinationType(String type);
+	BlockDeviceMappingBuilder destinationType(BDMDestType type);
 
 	/**
 	 * Either snap or any other value, including a blank string. snap means that the volume was created from a snapshot.
 	 *
 	 * @param type the source type
 	 * @return BlockDeviceMappingBuilder
 	 */
-	BlockDeviceMappingBuilder sourceType(String type);
+	BlockDeviceMappingBuilder sourceType(BDMSourceType type);
 
 	/**
 	 * Set to True to delete the volume when the instance is deleted. Set to False to retain the volume when the instance is deleted.

core/src/main/java/org/openstack4j/openstack/compute/domain/NovaBlockDeviceMappingCreate.java

@@ -1,18 +1,21 @@
 package org.openstack4j.openstack.compute.domain;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+import org.openstack4j.model.compute.BDMDestType;
+import org.openstack4j.model.compute.BDMSourceType;
 import org.openstack4j.model.compute.BlockDeviceMappingCreate;
 import org.openstack4j.model.compute.builder.BlockDeviceMappingBuilder;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+
 /**
  *
  * @author jaroslav.sovicka@oracle.com
  */
 public class NovaBlockDeviceMappingCreate implements BlockDeviceMappingCreate {
 
 	public String device_name;
-	public String source_type = "volume";
-	public String destination_type = "volume";
+	public BDMSourceType source_type = BDMSourceType.VOLUME;
+	public BDMDestType destination_type = BDMDestType.VOLUME;
 	public String uuid;
 	public String boot_index;
 	public Integer volume_size;
@@ -61,13 +64,13 @@ public BlockDeviceMappingBuilder bootIndex(int i) {
 		}
 
 		@Override
-		public BlockDeviceMappingBuilder sourceType(String type){
+		public BlockDeviceMappingBuilder sourceType(BDMSourceType type){
 			create.source_type = type;
 			return this;
 		}
 
 		@Override
-		public BlockDeviceMappingBuilder destinationType(String type){
+		public BlockDeviceMappingBuilder destinationType(BDMDestType type){
 			create.destination_type = type;
 			return this;
 		}